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1771sc-IFE32 32-Channel Analog Input Module Configuration with PLC-5 ControlNet Systems Page 3 of 7

Spectrum Controls, Inc Phone: (425) 746-9481

P.O. Box 5533 Fax: (425) 641-9473

Bellevue, WA 98006 Web Site: www.spectrumcontrols.com

IMPORTANT: A ControlNet discrete I/O connection must exist and be active to the I/O chassis in which the

1771sc-IFE32 is installed for the CIO instructions to work. If this connection has not been created with

RSNetworx for ControlNet software, or if that connection is not successful, then the CIO instruction will return an

error code 119 hex (which has a description “Owner Connection Not Open”).

Module Input and Status Data (Unscheduled):

After a configuration block has been sent to the 1771sc-IFE32 and the module has gone through initialization and

calibration, it is ready to return input data to the controller via CIO 1771 Read instructions.

Two input data modes may be used:

41 words Input Channel Data and Module Status

64 words Data, Status and Configuration Echo

The format of these data tables is explained in Chapter 5 of the User’s Guide.

The module will not respond to BTR requests during initialization or calibration, or during the RTS time period if

Real Time Sampling is being used. However, because CIO instructions do not have a built-in timeout period, they

can be programmed to simply wait for data and ignore the BTR refusals during calibration. The Done (.DN) bit of

the CIO instruction may be used to verify that valid data is coming from the module, in conjunction with the module

status data.

A CIO 1771 Read instruction might be configured in RSLogix 5 as follows:

1 2 3 4 5 6 7

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Allen-Bradley PLC-5 Manual de usuario Pagina 3